A tripping mechanism of a leakage switch

Abstract

The invention discloses a tripping mechanism of a leakage switch, which comprises a fixed kit, a shield arranged on the fixed kit, a power plug pin and a moving spring piece. The lower part of the power plug pin passes through the lower part of the fixed kit, and a static contact is arranged on the upper part. The front part of the moving spring piece is provided with a moving contact for conducting current when contacting with the static contact and a driving member for driving the moving spring piece to move so that the moving contact is connected with the static contact. The moving contact and the static contact are arranged inside the shield, and the chip is arranged outside the shield. An elastic reset device is inserted on the driving member, and a buckle for clamping the driving member on the elastic reset device so that the driving member acts together with the elastic reset device. An armature is clamped on the end of the buckle. A coil for sucking back the armature and a reset spring for resetting the armature are sleeved on the rear part of the armature. By covering the static contact and the moving contact with the shield, the shield plays a role in isolating the arc and preventing fire, thereby protecting the chip.

Description

Technical Field

[0001] The present invention relates to the field of electrical appliances, and in particular to a tripping mechanism of a leakage switch. Background Art

[0002] Since the leakage switch can quickly trip and cut off the power supply when the electrical appliance is short-circuited or the wire is leaking electricity, thus preventing the user from getting an electric shock and improving the use safety of the electrical appliance, the leakage switch is widely used in various circuits; however, the tripping mechanism of the leakage switch on the market at present has a complex structure, is cumbersome to manufacture, has a high production cost, and there is no barrier between the moving reed and the chip. When the static contact and the moving contact are in contact, an electric arc is easily generated, which is likely to damage the chip. At present, there is no effective method to solve the above problems.

[0003] The present invention is made based on the above situation. Summary of the Invention

[0004] The present invention overcomes the deficiencies of the prior art and provides a tripping mechanism of a leakage switch with a simple structure, easy to produce, low production cost, and capable of blocking the electric arc generated by the static contact and the moving contact to protect the chip.

[0005] The present invention is realized through the following technical solutions:

[0006] A tripping mechanism of a leakage switch includes a fixed kit, a protective cover provided on the fixed kit, a power plug, and a moving spring piece. The lower part of the power plug passes out from below the fixed kit and a static contact is provided on the upper part. The front part of the moving spring piece is provided with a moving contact for conducting current when contacting the static contact and a driving member for driving the moving spring piece to move so that the moving contact is in contact with the static contact. The moving contact and the static contact are inside the protective cover, and the chip is provided outside the protective cover. An elastic reset device is inserted on the driving member and a buckle for clamping the driving member on the elastic reset device so that the driving member moves with the elastic reset device. An armature is clamped on the end of the buckle, and a coil for sucking back the armature so that the buckle is disengaged from the elastic reset device and a reset spring for resetting the armature are sleeved on the rear part of the armature.

[0007] The above elastic reset device includes a reset key and a tripping spring for pushing up the reset key. A guide rod is provided below the reset key, the tripping spring is sleeved on the guide rod, and a notch for the buckle to be clamped is provided on the guide rod.

[0008] A through hole for the buckle to be inserted and clamped with the guide rod is provided on the driving member at a position corresponding to the buckle.

[0009] The front side of the armature described above is provided with a concave area. The front end of the buckle is a horizontal first clamping plate. A clamping opening for clamping with the guide rod is provided at the front end of the first clamping plate. The rear end of the buckle is provided with a second clamping plate that stands upright upward. A sliding groove for the buckle to slide up and down along the concave area is provided on the second clamping plate.

[0010] The power supply pin described above is provided with a first lead for connecting to the chip.

[0011] The moving spring piece described above is provided with a second lead for connecting to the chip.

[0012] The coil described above is provided with a third lead for connecting to the chip.

[0013] The power supply pin described above includes a left power supply pin and a right power supply pin.

[0014] The protective cover described above is made of a material that is heat-resistant and non-conductive.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. When an electric leakage accident occurs accidentally during the use of an electrical device, when the leakage current reaches above a predetermined set value, the power supply can be cut off, thus playing a role in protecting personal safety and the electrical device.

[0017] 2. By covering the static contact and the moving contact with the protective cover, the protective cover plays a role in isolating the electric arc and flame retardancy, thereby protecting the chip.

[0018] 3. The power supply pin and the moving spring piece are respectively provided with a first lead and a second lead for connecting to the chip, which simplifies the welding process of introducing current.

[0019] 4. The structure of the present invention is simple, easy to produce, has a low production cost, and is convenient for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following further describes the specific embodiments of the present invention in conjunction with the drawings, where:

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a schematic structural diagram of the present invention after hiding the protective cover;

[0023] Figure 3 is an exploded view of the present invention;

[0024] Figure 4 is a cross-sectional view of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] The following further describes the present invention in conjunction with the drawings:

[0026] As Figures 1 to 4 shown, a tripping mechanism of a leakage switch includes a fixed kit 1, a shield 2 provided on the fixed kit 1, a power plug 3, and a moving spring piece 4. The lower part of the power plug 3 passes through the lower part of the fixed kit 1, and a static contact 31 is provided on the upper part. A moving contact 41 for conducting current when contacting the static contact 31 and a driving member 5 for driving the moving spring piece 4 to move so that the moving contact 41 contacts the static contact 31 are provided at the front part of the moving spring piece 4. The moving contact 41 and the static contact 31 are inside the shield 2, and the chip is outside the shield 2. An elastic reset device is inserted on the driving member 5, and a buckle 6 for clamping the driving member 5 on the elastic reset device so that the driving member 5 moves together with the elastic reset device is provided. An armature 7 is clamped on the end of the buckle 6. A coil 8 for sucking back the armature 7 so that the buckle 6 disengages from the elastic reset device and a reset spring 9 for resetting the armature 7 are sleeved on the rear part of the armature 7.

[0027] When the electrical leakage of the electrical appliance reaches a predetermined set value, the control circuit generates a current to pass through the coil 8. At this time, the coil 8 generates an electromagnetic force to suck back the armature 7. And because the buckle 6 is clamped on the armature 7, the buckle 6 moves with the armature 7 and disengages from the elastic reset device. At this time, the driving member 5 separates the moving contact 41 from the static contact 31 to cut off the power supply. When the elastic reset device is pressed down, the reset spring 9 re-clamps the buckle 6 with the elastic reset device. At this time, the elastic reset device will pull up the driving member 5 and the buckle 6 together, so that the moving contact 41 contacts the static contact 31 to conduct current.

[0028] A shield 2 covering the static contact 31 and the moving contact 41 is provided on the fixed kit 1. An arc may be generated when the static contact 31 and the moving contact 41 contact. The chip is outside the shield 2. The shield 2 plays a role in isolating the arc and preventing fire, so as to protect the chip.

[0029] The above-mentioned elastic reset device, driving member 5, power plug 3 and other components are installed on the shield 2. The fixed kit 1 sets on the driving member 5, power plug 3 and other components, playing a role of fixing and positioning, making the structure of the tripping mechanism more compact.

[0030] The elastic reset device includes a reset key 10 and a tripping spring 11 for jacking up the reset key 10. A guide rod 12 is provided below the reset key 10. The tripping spring 11 is sleeved on the guide rod 12. A notch 121 for clamping the buckle 6 is provided on the guide rod 12. A through hole 51 for inserting the buckle 6 and clamping with the guide rod 12 is provided at the position corresponding to the buckle 6 on the driving member 5.

[0031] When the reset button 10 is pressed to make the buckle 6 latch onto the notch 121, the release spring 11 is compressed and its lower end abuts against the shield 2. The release spring 11 will pull the driving member 5 and the buckle 6 upward together, so that the moving contact 41 contacts the static contact 31 to conduct current; when the buckle 6 disengages from the notch 121, the release spring 11 will push up the reset button 10, while the driving member 5 will fall downward, so that the moving contact 41 separates from the static contact 31 to cut off the power supply.

[0032] There is a concave area 71 on the front side of the armature 7. The front end of the buckle 6 is a horizontal first clamping plate 61. A clamping notch 611 for clamping with the guide rod 12 is provided at the front end of the first clamping plate 61. The rear end of the buckle 6 is provided with an upwardly erected second clamping plate 62. A sliding groove 621 for the buckle 6 to slide up and down along the concave area 71 is provided on the second clamping plate 62. The sliding groove 621 provides space for the up and down movement of the buckle 6.

[0033] The power plug 3 is provided with a first lead 13 for connecting to the chip. The moving spring piece 4 is provided with a second lead 14 for connecting to the chip. The coil 8 is provided with a third lead 15 for connecting to the chip.

[0034] The power plug 3 and the moving spring piece 4 are respectively provided with the first lead 13 and the second lead 14 for connecting to the chip, which simplifies the welding process of introducing current and makes the assembly of the product more convenient.

[0035] The power plug 3 includes a left power plug 301 and a right power plug 302, and the left power plug 301 and the right power plug 302 are respectively used to connect the neutral wire and the live wire of the power supply.

[0036] The shield 2 is made of a material that is heat-resistant and non-conductive, such as BMC molding compound, etc. The structure of the present invention is simple, easy to produce, has a low production cost, and is convenient for mass production.

Claims

1. A tripping mechanism for a leakage switch, characterized in that: It includes a fixed kit (1), a shield (2) provided on the fixed kit (1), a power plug (3) and a moving spring piece (4). The lower part of the power plug (3) passes through below the fixed kit (1) and a static contact (31) is provided on the upper part. The front part of the moving spring piece (4) is provided with a moving contact (41) for conducting current when contacting the static contact (31) and a driving member (5) for driving the moving spring piece (4) to move so that the moving contact (41) is connected to the static contact (31). The moving contact (41) and the static contact (31) are inside the shield (2), and the chip is outside the shield (2). An elastic reset device is inserted on the driving member (5) and a buckle (6) for clamping the driving member (5) on the elastic reset device so that the driving member (5) acts together with the elastic reset device. An armature (7) is clamped on the end of the buckle (6). A coil (8) for sucking back the armature (7) so that the buckle (6) is disengaged from the elastic reset device and a reset spring (9) for resetting the armature (7) are sleeved on the rear part of the armature (7); The elastic reset device includes a reset key (10) and a tripping spring (11) for jacking up the reset key (10). A guide rod (12) is provided below the reset key (10). The tripping spring (11) is sleeved on the guide rod (12). A notch (121) for the buckle (6) to be clamped is provided on the guide rod (12); A through hole (51) for the buckle (6) to be inserted and clamped with the guide rod (12) is provided at the position corresponding to the buckle (6) on the driving member (5); An inner concave area (71) is provided on the front side of the armature (7). The front end of the buckle (6) is a horizontal first clamping plate (61). A clamping opening (611) for clamping with the guide rod (12) is provided at the front end of the first clamping plate (61). A second clamping plate (62) that stands up upward is provided at the rear end of the buckle (6). A sliding groove (621) for the buckle (6) to slide up and down along the inner concave area (71) is provided on the second clamping plate (62); The shield (2) is made of a material that is heat-resistant and non-conductive.

2. A tripping mechanism for a leakage switch according to claim 1, characterized in that: A first lead (13) for connecting the chip is provided on the power plug (3).

3. A tripping mechanism for a leakage switch according to claim 1, characterized in that: A second lead (14) for connecting the chip is provided on the moving spring piece (4).

4. A tripping mechanism for a leakage switch according to claim 1, characterized in that: A third lead (15) for connecting the chip is provided on the coil (8).

5. A tripping mechanism for a leakage switch according to claim 1, characterized in that: The power plug (3) includes a left power plug (301) and a right power plug (302).

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